DISCOVER-AQ Houston TOPAZ Data

September 12, 2013

September 12. Thursday.
TOPAZ data were collected from about 0822 to 1722 CDT, bracketing the NASA P-3 and King Air flights. P3 missed approaches at approximately 1115, 1355, and 1642 CDT. Mostly clear with a few scattered clouds all day. Low surface O3 (about 20 ppbv) early, increasing to more than 60 ppbv before decreasing again as the Gulf breeze arrived and the winds shift from E to SE. Ozone remained higher (60-70 ppbv) aloft where the winds remained easterly or rotated slightly to the NE in the late afternoon.